Method get

build-system/common/transform-cache.js:34–48

* @param {string} hash * @return {null|Promise }

(hash)

   * @return {null|Promise<T>}
   */
  get(hash) {
    const cached = this.transformMap.get(hash);
    if (cached) {
      return cached;
    }

    const filename = this.key_(hash);
    if (this.fsCache.has(filename)) {
      const persisted = fs.readJson(path.join(this.cacheDir, filename));
      this.transformMap.set(hash, persisted);
      return persisted;
    }

    return null;
  }

  /**
   * @param {string} hash